Scatter Plots, Trend Lines, Two-Way Tables, Correlation

• Positive

• Negative

• None

• The more you miss school the higher your grade will be.

• The more days that you are absent the lower your grade will be.

• There is no correlation between days absent and your grade.

Looking at the graph showing a line of best fit, what is the correlation shown?

• Length of life is constant

• Length of life increases as amount of sunlight increases

• Length of life increases as amount of sunlight decreases

• Length of life decreases as amount of sunlight increases

Which of the following lines represents the line of best fit for the scatter plot?

• A

• B

• C

• D

• 315

• 472.5

• 321

• 324

Looking at the graph, what is the correlation between the x and y variables?

• y increases as x increases

• y is constant

• y decreases as x descreases

• y decreases as x increases

Sammy is selling his comic book collection on the internet. The scatterplot shows how many comic books he has left at the end of each day. Using the trend line, how many comic books should Sammy have left after 6 days?

• 15

• 10

• 30

• 8

Which scatter plot could have a trend line whose equation is y hat= 3x + 10?

• A

• B

• C

• D

Sammy is selling his comic book collection on the internet. The scatterplot shows how many comic books he has left at the end of each day. Using the trend line, after how many days should Sammy predict to have 10 comic books left?

• 8

• 0

• 9

• 2

The scatterplot shows the temp, in degrees, outside a house every hour for 10 hours.

Estimate the temp after 13 hours based off the trendline.

• 57.5

• 50

• 10

• 13

• 61.5